英文活塞式压力计说明书.doc

User’s Manual for Piston Pressure Gauge Model YS-6、60、250、600
ⅠApplications
Piston pressure gauge grade (“pressure gauge” herein after) is used to inspect piston pressure gauge grade and precision pressure gauge.
Ⅱ Operational Principle and Basic Structure
Operational principle of this pressure gauge is that pressure exerted on the piston surface by the weight of the piston itself and that of specific weight will be balance with the pressure produced in hydraulic container.
The pressure gauge is composed by two parts: testing pump and gauge system. Details please see the picture.
Testing pump includes hand pump (11)、oil cup (9) and two valves (6) and (7). There are two nuts installed at valve (6) and (7), which are used to connect precision gauge under test. Main part of the gauge system is a precisely finished piston with precision cross-section. This piston directly load the weight of the weights on the chassis.
Ⅲ Technical Data
Table 1
Accuracy
Basic Errors
When pressure is below the lower limit of test range
When pressure is within the test range

±% of lower limit of test range
±% of the real pressure value
Buoyancy force of bearing bar (include piston head) of YS-250、600 piston gauge immerging in the working fluid is .
YS-6 piston pressure gauge:
Error “